This alert expired on 4 July 2026 at 00:15 UTC. It is kept here as a record.
No stronger detection stands among the 100 recorded within 20 km of this point since 10 March 2026 — 62 others scored the same. Another comparable one was recorded here earlier the same day. 21 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued July 3 at 6:44PM CDT until July 3 at 7:15PM CDT by NWS Birmingham AL
An estimated 538,692 people live within 50 km of this point.
Nearby, since 10 March 2026
- July 4, 2026 · score 48 · 1.8 km
- May 28, 2026 · score 48 · 2.7 km
- June 8, 2026 · score 48 · 3.1 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 48 out of 100, at 78 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Event Data
| Type | Severe weather |
| Severity | medium |
| Calamity Score (ours) | 48 / 100 |
| Our confidence | 78% |
| Coordinates | 33.4820, -86.7280 |
| Nearest City | Mountain Brook (3 km) |
| Population Exposed | 538.7K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-03T23:44:00.000Z |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Jefferson, AL; Shelby, AL |
| Headline | Severe Thunderstorm Warning issued July 3 at 6:44PM CDT until July 3 at 7:15PM CDT by NWS Birmingham AL |
| Expires | 2026-07-03T19:15:00-05:00 |
| SenderName | NWS Birmingham AL |
| HasExactCoords | true |
Safety Information
Always follow official guidance from your local emergency management agency. This platform provides scientific monitoring data and is not a substitute for official warnings. If you are in immediate danger, contact your local emergency number.
Series begins 10 February 2026. Comparisons refer to that period only. Collection gap: 14-26 August 2026.
This data is aggregated algorithmically from scientific sources. Not a replacement for official emergency warnings.
Calamity.live data shows a weather event with CalamityScore 48/100, near Mountain Brook (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 191 scientific monitoring sources.